EP4372489A1 - Dispositif de mise à zéro à ressort - Google Patents

Dispositif de mise à zéro à ressort Download PDF

Info

Publication number: EP4372489A1
Authority: EP; European Patent Office
Prior art keywords: zero; setting; lever arm; control means; compression spring
Prior art date: 2022-11-15
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Pending

Application number

EP22207387.6A

Other languages

German (de)

English (en)

Inventor

Christoph Damasko

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Damasko Praezisionstechnik & Co Kg GmbH

Original Assignee

Damasko Praezisionstechnik & Co Kg GmbH

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2022-11-15

Filing date

2022-11-15

Publication date

2024-05-22

2022-11-15 Application filed by Damasko Praezisionstechnik & Co Kg GmbH filed Critical Damasko Praezisionstechnik & Co Kg GmbH

2022-11-15 Priority to EP22207387.6A priority Critical patent/EP4372489A1/fr

2024-05-22 Publication of EP4372489A1 publication Critical patent/EP4372489A1/fr

Status Pending legal-status Critical Current

Links

230000007246 mechanism Effects 0.000 title description 5
230000006835 compression Effects 0.000 claims abstract description 105
238000007906 compression Methods 0.000 claims abstract description 105
230000033001 locomotion Effects 0.000 claims description 47
230000000295 complement effect Effects 0.000 claims description 7
238000012423 maintenance Methods 0.000 abstract description 5
238000004519 manufacturing process Methods 0.000 abstract description 4
230000005540 biological transmission Effects 0.000 description 5
230000036540 impulse transmission Effects 0.000 description 4
230000008901 benefit Effects 0.000 description 3
238000004804 winding Methods 0.000 description 2
230000009471 action Effects 0.000 description 1
238000010276 construction Methods 0.000 description 1
230000000694 effects Effects 0.000 description 1
230000005489 elastic deformation Effects 0.000 description 1
238000005259 measurement Methods 0.000 description 1
230000036316 preload Effects 0.000 description 1
230000008439 repair process Effects 0.000 description 1
230000000284 resting effect Effects 0.000 description 1

Images

Classifications

- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/06—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch
- G04F7/062—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch with reset mechanisms

Definitions

the invention relates to a zero-setting device for a chronograph movement, comprising at least one zero-setting heart, a zero-setting unit and a control means.
the zero-setting unit has a zero-setting lever arm and a zero-setting lever latch. A first end of the zero-setting lever latch is designed to rest against the at least one zero-setting heart.
the control means interacts with the zero-setting lever arm, wherein a zero setting of the zero-setting unit is brought about by actuation of the control means.
the invention also relates to a chronograph with such a zero-setting device, the central second counter hand and the central minute counter hand of which are each mounted so as to be rotatable about the main axis of the chronograph movement.
a chronograph is usually understood to be an analogue, mechanical watch or wristwatch with a stopwatch function.
the movement includes additional counter hands, e.g. a second and a minute hand, which can be rotated independently of the hands intended for displaying the time.
the timing is started and stopped using a start/stop button.
the second and minute hands can be reset to their initial zero position, in which the hands are directed towards the number zero on the dial, in order to enable a new timing.
the second and minute hands are reset to the zero position using a zero-setting device, which is another component of the chronograph movement.
the zero-setting device comprises two, usually heart-shaped cams, also known as zero-setting hearts, which are connected to the chronographic counters, e.g. a second and minute counter hand, in a torque-transmitting manner.
a latch also known as a zero-setting lever latch, has a hammer at each end When a hammer hits the associated cam, the latter is forced into a position in which the stop surface of the cam rests against the complementary stop surface of the hammer. The stop surface of the cam and the pointer position are aligned in such a way that the pointer is then in the zero position. This position, in which the bolt or its ends or hammers rest against the heart-shaped cams in order to cause them to rotate and thus reset the pointers to the zero position, is called the zero position.
the latch with the two hammers is movably connected to a zero-setting lever, also known as the zero-setting lever arm.
a zero-setting lever also known as the zero-setting lever arm.
the latch and the zero-setting lever are held in a free position in which the two hammers cannot come into contact with the heart-shaped cams.
the hammers act on the heart-shaped cams in the zero position, which resets the hands to the zero position.
the force applied by the user to the pusher is transferred to the zero-setting device via an intermediate control device, here also implemented as a lever.
the user must overcome the opposing return spring force.
the disadvantage of this arrangement is that the force or impulse applied by the user against the return spring force is often not sufficient to ensure reliable rotation of the cams and thus reset of the hands. The user may often have to press the button several times to reset the hands to the zero position.
the patent specification US9,164,492 B2 discloses a zero-setting device for a chronograph.
the zero-setting device shown here comprises a total of three zero-setting cams, which correspond to respective zero-setting latches or zero-setting hammers.
Each hammer has a stop surface at a first end that is complementary to the shape of the associated zero-setting cam.
the individual hammers are kinetically connected to one another. connected, but can rotate independently about their respective axes. By means of a return spring and a return latch, the hammers are initially held in a rest position in which there is no engagement with the associated zero-setting cams.
Each of the hammers is also assigned a respective hammer spring, the fastening end of which is firmly connected to the second end of the hammer.
the other, free end of the hammer springs rests on the respective pins of a winding and release device.
the winding and release device By pressing the reset button, the winding and release device is to be deflected via a control device in such a way that the hammer springs supported on it are tensioned or "wound up", which results in a respective pre-tension of the individual hammers.
the positioning of the hammers themselves initially remains unchanged. Only when the reset button is pressed again is a position of the reset latch finally reached in which the hammers are released and are pivoted by the pre-tensioned springs into contact with the respective zero-setting cams.
the pre-tension is intended to increase the impulse on the zero-setting cams and thus to achieve the zero position more reliably.
the zero-setting device shown is complicated and has a large number of individual components, which not only increases the costs but also the maintenance effort and the need for repairs.
Each of the zero-setting cams is coupled to a separate zero-setting hammer, which is why the individual hands are often reset to the zero position at different times.
the user In order to achieve a zero setting, the user must overcome not only the force of the return spring, but also the opposing force of each individual hammer spring. This requires a comparatively high amount of force and therefore reduces the ease of use.
a zero-setting device for a chronograph which has as essential components a second zero-setting heart, a minute zero-setting heart and a zero-setting unit with a zero-setting lever arm and a zero-setting lever latch.
the zero-setting lever latch is designed with its first end or "hammer” to stop against the second zero-setting heart and with its second end or “hammer” to stop against the minute zero-setting heart, so that As described above, when the respective ends are brought into contact, these can be rotated into a position in which the connected hands are held in their zero position.
the chronograph disclosed here is equipped with a central seconds counter hand and a central minutes counter hand which, like the hands intended for displaying the time, rotate around the central main axis of the movement.
a control cam holds the zero-setting unit in the free position in which the two ends of the zero-setting lever latch are not in contact with the seconds or minute zero-setting heart.
the control cam can be rotated so that the zero-setting lever arm is released and a compression spring resting on the zero-setting lever arm moves the zero-setting lever latch indirectly by pivoting the zero-setting lever arm in the direction of the zero-setting hearts.
a rod connected to the control cam in the form of a second zero-setting unit, acts directly on the zero-setting lever arm so that the rotation of the control cam simultaneously causes the zero-setting lever arm to pivot.
the hands By zeroing the zero-setting unit on the one hand by pre-tensioning the compression spring and on the other hand via the rod by a rotational movement of the control cam initiated by the user, the hands should be reset to the zero position more reliably.
the rod is fixed in place in the chronograph's movement and converts the rotary motion of the control cam into a directed pressure motion on the second or minute zero-setting heart.
the rod comprises several individual components that are each mounted so that they can move relative to one another. The disadvantages are the increased maintenance effort and increased manufacturing costs caused by the additional rod components.
the object is achieved by a zero-setting device according to claim 1 and a chronograph with a zero-setting device according to claim 16.
a zero-setting device according to the invention of the type described in more detail at the outset is characterized in that the zero-setting device comprises a first compression spring which is supported on the zero-setting lever arm and is operatively connected to the control means, wherein the control means interacts indirectly with the zero-setting unit via the first compression spring.
the zero setting unit By operating the control means, the zero setting unit can be moved from a free position, in which the first end of the zero setting lever latch cannot come into contact with the at least one zero setting heart, to a zero position, in which the first end of the zero setting lever latch rests against the at least one zero setting heart.
the control means does not act directly on the zero setting lever arm, but indirectly via the first compression spring.
a significant advantage here is that the first compression spring fulfills two functions at the same time.
the compression spring is provided for spring loading the zero setting lever arm by elastic deformation and, on the other hand, for transmitting the movement of the control means to the zero setting lever arm.
the zero setting lever arm and the first compression spring are aligned with one another in such a way that the first compression spring is supported on the zero setting lever arm.
the first compression spring is used to transmit force from the control means to the zeroing lever arm in order to support the movement of the zeroing unit from the release position to the zero position.
a further advantage is that even after the zeroing unit has been set to zero, has been effected, the spring force of the first compression spring can continue to bear on the zero-setting lever arm, whereby the zero-setting unit is permanently forced into the zero position or is held there. In this way, the rotation of the at least one zero-setting heart required to zero the counter hands of the chronograph can be achieved more reliably and by only pressing the reset button once. Because the use of the compression spring replaces more complex constructions, such as rods or similar, the total number of components of the zero-setting device, in particular the number of moving components or components that move relative to one another, can be reduced, which drastically reduces manufacturing costs and maintenance requirements.
the zero setting lever arm can also be preloaded by the first compression spring in the free position, i.e. before the control means is actuated to bring about the zero position.
the zero setting lever arm therefore has a bolt or pin-like stop on which the first compression spring is supported.
the spring force acting on the zero setting lever arm can be increased or reduced as required, whereby in particular the aforementioned preload can be implemented.
the bolt or pin-like stop is designed as an eccentric for fine adjustment of the spring force exerted by the first compression spring on the zero-setting lever arm.
the stop can be seated eccentrically in a receptacle of the zero-setting lever arm, whereby its positioning on the zero-setting lever arm can be changed by turning the eccentric, e.g. with a screwdriver.
the spring force of the first compression spring supported on the bolt or pin-like stop can be adjusted with high precision for fine adjustment of the zero-setting device.
the first compression spring has a fastening end and a free end, the fastening end being directly connected to the control means and the free end being supported on the zeroing lever arm.
the first compression spring is preferably designed as a U-shaped bow spring. The fastening end connected to the control means is then arranged on one leg and the free end supported on the zeroing lever arm is arranged on the other leg.
the zero-setting lever arm and the first compression spring perform a movement in opposite directions to each other by actuation of the control means in order to bring about the zero setting of the zero-setting unit.
the first compression spring can be connected to the control means in particular in a torque-transmitting manner and the zero-setting lever arm can be connected to the zero-setting lever latch at its second end and can be mounted at its first end so that it can rotate and/or pivot about a zero-setting lever arm pivot point, so that a rotation and/or pivoting movement of the control means about its axis of rotation results in a rotation and/or pivoting movement of the compression spring in the same direction and an opposite rotation and/or pivoting movement of the zero-setting lever arm.
the zero-setting lever latch is preferably articulated to the second end of the zero-setting lever arm so that it can pivot freely.
this is achieved by the first compression spring then being supported in an area of the zero-setting lever arm between the connection with the zero-setting lever latch and the rotating and/or pivoting bearing on the latter.
the rotational movement transmitted from the control means to the compression spring causes the compression spring to pivot by a small amount in a first direction of rotation, which corresponds to the clockwise direction of the chronograph.
the free end of the first compression spring acts on the zero-setting lever arm, causing it to rotate around the zero-setting lever arm pivot point, and in a second direction of rotation, opposite to the first direction of rotation and anti-clockwise.
the first end of the zero setting lever arm which is connected to the zero setting lever latch, is thus pivoted in the direction of the at least one zero setting heart by the action of the first compression spring, whereby the zero setting lever latch comes into contact with the at least one zero setting heart, ie the zero setting of the zero setting unit is brought about.
the zero setting can be released and the zero setting unit can be returned to the free position, which enables a new time measurement.
the control means itself can be operated via a reset button that protrudes from the chronograph case for operation by a user.
a reset button that protrudes from the chronograph case for operation by a user.
the longitudinal force of the reset button is converted into a rotary movement of the control means and the control means is pivoted about its axis of rotation.
the zero setting of the zero setting unit is supported by a second compression spring that is mounted in a fixed position in the chronograph movement and whose free end is also supported on the zero setting lever arm, exerting a spring force that causes the zero setting of the zero setting unit.
the second compression spring is preferably in a deflected position when the zero setting unit is in the free position, so that the second compression spring exerts a permanent pressure or spring force on the zero setting lever arm, which forces the zero setting unit into the zero position.
the first compression spring and the second compression spring redundantly cause the zero setting of the zero setting unit when the control means is actuated, whereby the first compression spring is elastically deformed, in particular deflected or tensioned, by the movement of the control means and the second compression spring relaxes from a deflected position towards its rest position.
Both the first and the second compression spring are supported on the zero setting lever arm, the zero setting lever arm is double-spring loaded. Due to the double spring loading of the zero setting unit, its zero setting can be achieved with a single By pressing the reset button, the chronograph hands are reset to a clear zero position. The zero setting can be released and the zero setting unit can be returned to the free position by pressing the start/stop button.
the first compression spring and the second compression spring are offset from one another with respect to the Z coordinate direction of the chronograph movement.
the first compression spring is offset from the zero-setting lever arm with respect to the Z coordinate direction and the second compression spring is arranged in a common plane with the zero-setting lever arm with respect to the Z coordinate direction.
this can be implemented, for example, by the first compression spring being supported on a bolt- or pin-like stop on the zero-setting lever arm and the second compression spring being supported on the outer contour on the front side of the arm.
the control means in particular in order to hold the zero setting unit in the free position against the spring force of the second compression spring, is in locking engagement with the first end of the zero setting lever arm.
the engagement can be released by actuating the control means in order to bring about the zero setting of the zero setting unit.
this can be implemented structurally in that the second end of the zero setting lever arm has a receptacle and the control means has a complementary contour for engaging in the receptacle of the zero setting lever arm.
the zero setting device can have a third spring, in particular a detent spring, which is mounted in a fixed position in the movement of the chronograph and whose free end interacts with the control means.
the free end of the third spring comes into engagement by actuating the control means, holding the control means in the position that brings about the zero setting.
the third spring is in particular designed as a detent spring and has a nose, for example V-shaped, at the free end, which interacts with a complementary contour of the control means or in This engages and thus prevents movement, in particular rotation, of the control means.
the third spring thus creates an additional safeguard for the zero position of the zero setting unit. By operating the start/stop button, the zero position can be released and the zero setting unit can be returned to the free position, which enables the timing to be started again.
the third spring can be arranged offset to the zero-setting lever arm and offset to the first compression spring with respect to the Z coordinate direction of the chronograph movement.
the first compression spring is arranged in a first, lower plane with respect to the Z coordinate direction, the zero-setting lever arm, the second compression spring and the control means in a second, common plane and the third spring in a third, upper plane.
the first and second compression springs are each operatively connected to the zero-setting lever arm via their respective free ends or are supported on it, the free end of the third spring interacts with the control means.
the other end, the fastening end, of the second compression spring and the third spring is each mounted in a fixed position in the chronograph movement, the fastening end of the first compression spring is in particular firmly or torque-transmittingly connected to the control means.
Actuation of the control means consequently causes a movement, in particular rotation of the first compression spring, which can be transmitted to the zero setting lever arm via its free end.
the zero setting lever arm is also released from the locked free position and the third spring engages to lock the zero position.
a chronograph according to the invention comprises a central second counter hand and a central minute counter hand, which are each mounted so as to be rotatable about the main axis of the clockwork for timekeeping.
the central second counter hand is provided with a second wheel and the Center minute counter hand connected to a minute wheel.
the chronograph is characterized in that the zero-setting lever latch of the zero-setting device has a first end for contact with a first zero-setting heart, namely a second zero-setting heart, and a second end for contact with a second zero-setting heart, namely a minute zero-setting heart.
the zero setting of the zero-setting unit can be effected by actuating the control means, wherein the control means interacts with the zero-setting unit via the first compression spring supported on the zero-setting lever arm.
the second zero-setting heart interacts directly with the second wheel to transmit torque
the minute zero-setting heart interacts indirectly with the minute wheel to transmit torque, in order to reset the center second counter hand and the center minute counter hand to their zero position.
Figure 1 shows a perspective view of an exemplary embodiment of a zero-setting device 100 according to the invention from an angle behind, i.e. from the view of the back of the chronograph, as well as some other components of the clockwork 300 that interact with the zero-setting device 100.
the clockwork 300 is driven by a pivot drive (not shown here) that brings the clock's gear train into engagement with the second wheel 310.
the second wheel 310 is firmly connected to the center second counter hand (not shown here) via a shaft.
the center second and center minute counter hands are each mounted so they can rotate about the main axis of the clockwork 300 of the chronograph.
a drive spring 311 is firmly connected to the second wheel 310 and is designed to engage with the pulse receiving wheel 330.
the pulse receiving wheel 330 is connected to the drive wheel (hidden in the figure) and the pulse transmission wheel 340 via a multi-function shaft.
the drive wheel is in constant engagement with the zero setting wheel 350 and the impulse transmission wheel 340 is in constant engagement with the minute wheel 320, the latter being connected to the central minute counter hand (not shown here) in a torque-transmitting manner.
the impulse receiving wheel 330 is rotated by one sub-unit by the driving spring 311.
the rotary motion is passed on to the drive wheel and the impulse transmission wheel 340 via the multi-function shaft, whereby the zero setting wheel 350 and the minute wheel 320 are moved further and finally the central minute counter hand advances by one unit.
a minute counter catch 321 engages in the minute wheel 320 to count the minutes that have passed during the timekeeping.
the zero-setting device 100 comprises, for example, a first zero-setting heart 110, a second zero-setting heart, and a second zero-setting heart 120, a minute zero-setting heart.
the second zero-setting heart 110 is fixed to the second wheel 310 and the minute zero-setting heart 120 is fixed to the zero setting wheel 350.
the zero setting unit 200 By operating the zero setting unit 200, the second zero setting heart 110 and the minute zero setting heart 120 can be rotated to the zero position shown here, which corresponds to the respective zero position of the center second and center minute counter hands.
the second zero setting heart 110 directly transmits torque with the second wheel 310 and the minute zero setting heart 120 indirectly transmits torque with the minute wheel 320 via the multi-function shaft, the drive wheel and the impulse transmission wheel 340.
the minute zero setting heart 120 could also be directly connected to the minute wheel 320.
the zero setting unit 200 is shown here in the zero position, in which the first end 221 of the zero setting lever latch 220 rests on the second zero setting heart 110 and the second end 222 rests on the minute zero setting heart 120.
the zero setting device 100 is made of Figure 1 in the same perspective view, but shown in the isolated position.
the zero-setting device 100 comprises the first or second zero-setting heart 110 and the second or minute zero-setting heart 120, a zero-setting unit 200 having the zero-setting lever latch 220 and the zero-setting lever arm 210, a control means 130 and a first compression spring 140.
the control means 130 is implemented here as a control cam, for example, and is mounted in the clockwork 300 of the chronograph so as to be pivotable and/or rotatable about its control means rotation axis SA.
the first compression spring 140 can be designed as a U-shaped bow spring, with a fastening end 141 connected to the control means 130 in a rotationally transmitting manner being arranged on one of the legs.
the other leg is designed as a free end 142 and is supported on the zero-setting lever arm 210, in particular on a bolt or pin-like stop 213 of the zero-setting lever arm 210.
the leg having the free end 142 and the zero setting lever arm 210 run approximately parallel to each other in the free position of the zero setting unit 200.
the zero setting lever arm 210 is mounted at its first end 211 so as to be rotatable about the zero setting lever arm pivot point 214.
the second end 212 of the The zero setting lever latch 220 is freely pivotable on the zero setting lever arm 210.
the bolt or pin-like stop 213 is arranged in an area between the first end 211 and the second end 212 of the zero setting lever arm 210, i.e. between the zero setting lever arm pivot point 214 and the
the control means 130 is pivoted about the control means axis SA in a clockwise direction of the clockwork 300 of the chronograph.
the first compression spring 140 which is firmly connected or torque-transmittingly connected to the control means 130, follows the rotary movement and also pivots in a clockwise direction of the clockwork 300. Because the compression spring 140 is supported with its free end 142 on the bolt or pin-like stop 213 of the zero setting lever arm 210, the latter is pivoted in a movement opposite to the first compression spring 140 about its zero setting lever arm pivot point 214, specifically in a direction of rotation counterclockwise of the clockwork 300 of the chronograph.
a pulse generator 143 is formed which, during the rotational movement of the first compression spring 140, exerts additional pressure on the zero-setting lever arm 210 and thus increases its impulse for rotation about the zero-setting lever arm pivot point 214.
the pivoting movement of the zero-setting lever arm 210 moves the zero-setting lever latch 220, which is articulated at its second end 212, in the direction of the zero-setting hearts 110, 120, so that finally the first end 221 of the zero-setting lever latch 220 comes into contact with the second zero-setting heart 110 and the second end 222 comes into contact with the minute zero-setting heart 120.
the zero-setting unit 200 is then in the zero position (see. Figure 1 ). Even after the zero position has been reached, the spring force of the first compression spring 140 continues to act on the zero setting lever arm 210, whereby the pressure exerted by the zero setting lever latch 220 on the zero setting hearts 110, 120 is increased and the zero setting unit 200 is permanently forced into the zero position or held there.
the force acting on the zero-setting lever arm 210 or its impulse for rotation about the zero-setting lever arm pivot point 214 can be further increased by a second compression spring 150, the function of which can be determined by the Figure 3 will be explained in more detail.
the Figure 3 shows a plan view from behind, ie from the viewpoint of the back of the chronograph, of the zero setting device 100 from the Figures 1 and 2 .
the zero setting unit 200 is in the zero position, in which the two ends 221, 222 of the zero setting lever latch 220 rest on the second or minute zero setting heart 110, 120.
the second compression spring 150 rests with its free end 152 on the zero setting lever arm 210.
the force application point at which the spring force applied by the second compression spring 150 acts on the zero setting lever arm 210 is selected such that the pivoting movement of the zero setting lever arm 210 is from the free position in which the second compression spring 150 is deflected against the spring force acting on the zero setting lever arm 210 (see Figure 2 ) to support the zero setting lever arm pivot point 214 in the zero position shown here.
the second compression spring 150 is fixedly mounted in the clockwork 300 via at least one mounting means (not shown).
the spring force of the second compression spring 150 acts permanently on the first end 211 of the zero setting lever arm 210. So that the second compression spring 150 does not cause the zero setting of the zero setting unit 200 during the timing, the first end 211 of the zero setting lever arm 210 is also operatively connected to the control means 130.
the first end 211 of the zero setting lever arm 210 can have a U-shaped receptacle 215.
the control means 130 has a correspondingly complementary contour and is arranged in relation to the receptacle 215 such that when the zero setting unit 200 is released, its contour is in locking engagement with the first end 211 of the zero setting lever arm 210 (see Figure 2 ).
Control means 130 By pressing the Control means 130 is pivoted about the control center axis SA in the clockwise direction of the clockwork 300, whereby the locking engagement is released and the contour of the control means 130 lies contact-free in the receptacle 215, as the Figure 3 can be seen.
the zero setting lever arm 210 is released and is simultaneously pivoted by the first compression spring 140 and the second compression spring 150 to the zero position of the zero setting unit 200.
both compression springs 140, 150 By using both compression springs 140, 150, the zero setting unit 200 is moved into the zero position with double spring loading and is held securely there by the spring forces that continue to act.
a reset button 360 is also shown, which protrudes from the housing of the chronograph and can be actuated, "pressed” by a user to exert a longitudinally directed force or movement.
the axial or longitudinal movement of the reset button 370 is converted into the previously described rotary or pivoting movement of the control means 130 by a transmission mechanism 370.
the control means 130 is actuated by "pressing” the reset button 360 and pivots about its control means rotation axis SA in the clockwise direction of the chronograph.
the Figures 4 and 5 show the zero setting device 100 from a front view, ie from the front of the chronograph.
the zero setting unit 200 is in the release and in the Figure 5 shown in the zero position.
a third spring 160 can be clearly seen, namely a detent spring, which is mounted with its fastening end 161 in a fixed position in the movement 300 of the chronograph.
the free end 162 of the detent spring 160 is designed with a V-shaped nose for engagement in complementary V-shaped receptacles 132 arranged on the outer contour of a detent means 131, in particular a detent cam.
the detent means 131 is a component of the control means 130 and is mounted on it in a floating manner and can be pivoted or rotated about the control means rotation axis SA.
the free end 162 of the detent spring 160 interacts with the control means 130 via the detent means 131 in order to hold it in the
the locking means 131 has a total of three V-shaped receptacles 132 running along the outer contour in the zero setting unit 200.
the V-shaped nose of the locking spring 160 engages in the frontmost receptacle 132 in the direction of rotation of the locking means 131.
the locking means 131 also rotates clockwise of the chronograph around the control center axis SA.
the locking spring 160 tries to engage completely in the V-shaped receptacles 132 and in doing so slides along the slope of the outer contour of the locking means 131. In the event that the locking spring 160 does not engage centrally in the V-shaped receptacles 132, the locking spring 160 will try to turn the locking means 131 away in one direction and thus precisely bring about the desired position of the control means 130 for the zero setting of the zero setting unit 200.
the reset button 360 is pressed.
the transmission mechanism 370 converts the linear movement of the reset button 360 into a pivoting movement of the locking means 131 or the control means 130 about the control means rotation axis SA in the clockwise direction of the chronograph.
the V-shaped nose of the locking spring 160 engages in the rearmost receptacle 132 in the direction of rotation of the locking means 131.
the third spring 160 thus further secures the zero setting unit 200 in the zero position.
the first compression spring 140 and the second compression spring 150 are arranged offset from one another with respect to the Z coordinate direction of the clockwork 300.
the second compression spring 150 is supported on the front side on the outer contour of the zero-setting lever arm 210 and is arranged with the zero-setting lever arm 210 and the control means 130 in a common plane with respect to the Z coordinate direction.
the first compression spring 140 on the other hand, is supported on the bolt or pin-like stop 213 of the zero-setting lever arm 210 protruding from the common plane and is, from the front side, of the chronograph together with the bolt or pin-like stop 213 in a lower plane below.
the third spring or detent spring 160 is in turn offset with respect to the Z coordinate direction from the first and second compression springs 140, 150 and is located together with the detent means 131 in an upper plane above the common plane when viewed from the front of the chronograph.
the bolt or pin-like stop 213 is designed as an eccentric, with an upper cylindrical section 216 with respect to the longitudinal axis and a lower cylindrical section 217 arranged eccentrically below it.
the upper cylindrical section 216 is provided for connection to a receptacle, in particular a bore of the zero-setting lever arm 210.
the lower cylindrical section 217 protrudes from the zero-setting lever arm 210 so that the first compression spring 140 can be supported on it (see e.g. Figure 1 ).
the lower cylindrical section 217 has a slot or a groove 218 which, with the aid of an appropriate tool, e.g. a screwdriver, allows rotation of the bolt or pin-like stop 213 in the holder of the zero-setting lever arm 210 about the rotation axis RA of the upper cylindrical section 216. Due to the eccentric arrangement of the lower cylindrical section 217, it follows a circular path on the zero-setting lever arm 210, whereby the position of the stop 213 can be changed relative to the first compression spring 140. In this way, the spring force of the first compression spring 140 supported on the bolt or pin-like stop 213 can be adjusted with high precision for fine adjustment of the zero-setting device 100.
an appropriate tool e.g. a screwdriver

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Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Measurement Of Unknown Time Intervals (AREA)

EP22207387.6A 2022-11-15 2022-11-15 Dispositif de mise à zéro à ressort Pending EP4372489A1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
EP22207387.6A EP4372489A1 (fr)	2022-11-15	2022-11-15	Dispositif de mise à zéro à ressort

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
EP22207387.6A EP4372489A1 (fr)	2022-11-15	2022-11-15	Dispositif de mise à zéro à ressort

Publications (1)

Publication Number	Publication Date
EP4372489A1 true EP4372489A1 (fr)	2024-05-22

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EP22207387.6A Pending EP4372489A1 (fr)	2022-11-15	2022-11-15	Dispositif de mise à zéro à ressort

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0996043A1 (fr) *	1998-04-21	2000-04-26	Seiko Epson Corporation	Dispositif de mesure du temps
US20090086583A1 (en)	2007-10-02	2009-04-02	Omega Sa	Zero reset device for two time counters
US9164492B2 (en)	2013-12-16	2015-10-20	Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie	Zero-reset device with independent hammers
DE202017107668U1 (de)	2017-12-18	2018-01-19	Uwe Heinz	Nullstellvorrichtung für Minutenzeiger eines Chronographen und Chronograph

2022
- 2022-11-15 EP EP22207387.6A patent/EP4372489A1/fr active Pending

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0996043A1 (fr) *	1998-04-21	2000-04-26	Seiko Epson Corporation	Dispositif de mesure du temps
US20090086583A1 (en)	2007-10-02	2009-04-02	Omega Sa	Zero reset device for two time counters
US9164492B2 (en)	2013-12-16	2015-10-20	Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie	Zero-reset device with independent hammers
DE202017107668U1 (de)	2017-12-18	2018-01-19	Uwe Heinz	Nullstellvorrichtung für Minutenzeiger eines Chronographen und Chronograph

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2024-04-19

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Public reference made under article 153(3) epc to a published international application that has entered the european phase

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